Tool holder



Aug. 4, 1942. H. A1. wlLsN ETAL `2,291,999

TOOL HOLDER Filed oct. 16.' 1939 3 Sheets-Sheet 1 mmk . MII

All f 4, 1942-` H. l. wlLsoN ETAL TOOL HOLDER Filed Oct. 16, 1939 3Sheets-Sheet 2 HIIILI Nm. A.

Aug. 4, 1942. l H. l. wlLsN Afsr AL TOOL HOLDER Filed Oct. 16, 1939 3Sheets-Sheet 3 as NQ mw Rm [N VENTORS Harry l'. VV[/son, Haff- Wilson`A' TTORNE Y Patented mAug. 4, 1942 Harry I. Wilson and Harry R.

Kansas City, Mo.

Wilson,

Application oetober 16,1939, serial No. 299,609

4 Claims.

This invention relates to tool holders and particularly to an adjustablemotor mounting whereby a tool driven by the motor may be readily movedto all positions necessary in performing a given piece of work, and hasfor its principal object to provide a mounting of this character that isextremely universal as to the number of positions of adjustment andwhich is designed` for extreme rigidity after adjustment.

Other objects of the invention are to provide a motor mounting wherewiththe motor is readily movable to any selected position; to provide amovable motor carriage that is readily manipulated with a minimum play;and to provide a motor mounting readily adjustable to various sizemotors.

In accomplishing these and other objects of the invention, ashereinafter pointed out; we have provided improved details of structure,the preferred form of which is illustrated in the accompanying drawings,wherein:

Fig. 1 is a perspective view of a motor driven tool mounting constructedin accordance with the present invention.

Fig. 2 isx a cross-section through the carriage supporting arm of thedevice on the line 2-2 of Fig. 1, a part of the arm mounting plate beingbroken away to better illustrate the clamping devices for securing thearm to its supporting bracket.

Fig. 3 is a detail section through the base of the standard,particularly illustrating swivel mounting thereof.

Fig. 4 is a front elevational view of the motor mounting.

' Fig. 5 is a side elevational view.

Fig. 6 is a plan view.

Fig. 7 is a rear elevational view.

Fig. 8 is an enlarged cross-section on the line 8-8 of Fig. 6,particularly illustrating roller gnounting of the motor carriage on thehorizontal supporting arm.

Fig. 9 is a detail section through one set of carriage rollers on theline 9 9 of Fig. 6, particularly illustrating adjustment thereof to takeup wear and eliminate play incidental to any inaccurate alignment of theguide tracks on the supporting arm.

Fig. 10 is a section through one of the eccentrics.

Referring more in detail to the drawings:

I designates a motor mounting constructed in accordance with the presentinvention, and which includes a trunnion or anchor plate 2 hav- Thetrunnion plate 2 is adapted for attachment to a work table, foundation,or other suitable support 5 by means of fastening devices 6, such asscrews, having shanks 'I projected through suitable openings in thetrunnion plate 2 and into threaded sockets 9 formed in the support 5.

The heads I0 of the screws are preferably countersunk within the top ofthe trunnion plate as shown in Fig. 3. Formed in the axis of thetrunnion plate is an opening I I for passing the shank I2 of a trunnionbolt I3, having the head II thereof positioned in a counterbore I5formed in the under side of the trunnion plate. The shank of the bolt isof suilicient length to project a material distance from the upper faceof the trunnion plate for clampingly retaining a turntable I6.

The turntable I6 constitutes the base portion of an upright kI 1 and hasa ilat, disk-like portion I8 provided with an annular shoulder I9 on theunder side, arranged to bear directly upon the annular edge of the iiattop 3 of the trunnion plate 2. Depending from the periphery of the diskportion I8 is an annular ange 20 engaging the circumferential face 4.The center of the disk portion I8 has an opening 2I in the axis thereofto pass the shank of the trunnion bolt. Threaded on the projecting endof the bolt is a nut 22 cooperating with the head I3 to retain theturntable on the trunnion plate, with the shoulder I9 thereof in bearingengagement with v the marginal edge 23 so that the upright I1 is adaptedto rotate on a vertical axis.

In order to latch the turntable in adjusted position, we provide a pinor bolt 24 which is reciprocably supported in a collar 25 that iscarried on the upper face of the disk-like portion of the turntable andwhich is adapted to project through an opening26 therein so that atapered end 21 of the bolt is adapted to engage in one of a circularseries of tapered sockets 28 that are provided in the upper face of thetrunnion plate. In order to move the bolt readily to and from engagementwith any one of the sockets, the head thereof is slotted, as at 29, andcarries an operating lever 30, which is pivoted in the sloty on a pin 3|in such a manner that a cam-like head 32 thereon engages the upper endof the collar to effect retraction of the bolt when theA lever is swungin a clockwise direction (Fig. 4). 'Ihe turntable carrying the uprightmay then be rotated to bring the boit 24 into registry with any one ofthe other sockets, after which the ing a dat top 3 and a circumferentialside face 4. 55 lever 30 is swung :retractively to permit settling ofthe tapered end of the socket.

The upright bolt into the selected |1 is of substantially channelshapedAcross-section and includes a face portion 33 reinforced on the rearside ing sides 43 and 44 connected by an arcl'n-sliiaped web 45. Thelower` edges of the side walls are i flanged-inwardly, as at 48', butterminate short of each other to provide a longitudinal slot 31. Therear end of the arm terminates in a clamp plate 48, having a faceportion 49 slidably engaging the ilat faces '38 of the guides andprovided with rearwardly directed flanges 50 and 5| on the side edgesthereof of suitable width to extend over the dovetail guides, theflanges being provided with grooves 52 having incllnedfaces 53correspending to the angle of the dovetail guides whereby the arm isretained at all times at right angles to the upright and free of lateralplay. 'I'he plate portion of the clamp is slotted at a pointintermediate the flanges, as indicated at 54, to provide flexibilitywhereby the iianges E@ and 5| may be drawn into clamping engagement withthe guides by clamping bolts 55 and S extending transversely through therespective ends of the clamp plate as clearly shown in Fig. 2.

The arm is preferably raised and lowered upon the uprightby a screwmechanism, best illustrated in Fig. 7. Fixed to the ilanges of the faceplate and bridging the webs of the upright is a bracket 51. including abar portion 58 having legs 59 terminating in foot flanges 60 that aresecured to the `iianges 50 and 5| of the face plate by fastening devices6|. Extending forwardly between the Webs 34 and 35 of the upright is atongue 62 having an internally threaded opening 63 located substantiallyin the extended axis of the trunnion plate 2, and in which a screw-shaft54 turns. The' lower end of the screw-shaft is rotatably xed within alug 65 extending rearwardly from the face web 34 of the upright I1.Fixed on' the screw-shaft is a bevelled gear 66 which meshes with thebevelled gear 61 on'a crank-shaft G8, the crank-shaft having its endsjournalled in suitable bearings in the webs 34 and 35 and provided witha crank 69 by which the shaft may be rotated to eiect rotation of thescrew-shaft.

r Rotation of the threaded shaft within the threaded opening |53 of thebracket 51 raises and lowers the arm 42 on the upright I1, .dependingupon the direction of crank rotation. i Formed along the lower edges-ofthe sides of the arm 42 are ribs 10 and 1| having coextensive grooves 12and 13, preferably of V-shaped crosssection, to mount rails 14 and 15.The rails 14 and are of' rectangular cross-section and are arranged sothat one of the corners of each seats within the V-shaped grooves 12 and13, the rails being secured in the grooves by cap-screws 16, as shown inFig. 8, so that they form a rigid part of the arm. The upper and lowercornerv edges 11 and 1B of the rails constitute V-shaped tracks formounting a motor carriage 19. The carriage includes a plate-like bodyportion 80, having upwardly extending sides 8| and 82 -spaced apart asufiicient distance to accommodate the horizontal arm 42 therebetween asvshown in Fig. 8. The ends of the plate-like body are slotted inregistry with the rails, as at 83, to accommodate rollers 04-85 and05-81, which are journalled in the respective slots on stub-shafts 03(Fig. 9). The stub-shafts 88 are carried on eccentrics 89 that areadjustably mounted in openings 90 of the carriage body. One side of theeccentrics is notched, as at 9| (Fig. 10) to provide shoulders 92engaged by adjusting screws 93, the adjusting screws being threaded intosuitable openings oii'- set with respect to the axis of the respectiveeccentrics. With this arrangement it will be noted that by tighteningthe screws the eccentrics are caused to be rotated to raise the rollersinto contact with the lower tracks thereby removing play oi the carriageon the arm.

Cooperating with the pairs of rollers just referred to, are pairs ofrollers 95-99 and .t1-9d spaced thereabove, three of which'are mountedon iixed. stub-shafts 99 and the fourth on an eccentrically mountedstub-shaft |90 similar to the lower rollers previously described.

The rollers are all of the same construction and include inner races Nimounted on the respective stub-shafts and outer races |02 forantiiriction bearings 8d3. The outer races |02 have the peripheriesthereof provided with V-shaped annular grooves |04 with the side faces|05 and I0@ corresponding to the diverging angle of the faces of theguide tracks whereby,'when the rollers are adjusted by means of theeccentrics, they retain the carriage from vertical and lateral movementwith respect to the arm 42. The carriage, Vhowever, is free to roll backand forth on the arm as later described.

Formed in the under face of the body portion of the carriage is aconical recess |01, having a tapered annular wall |08 in which ismounted a clamping disk |09, the disk |09 having a face ||0corresponding to the taper of the wall |08 so that it may be drawnvtightly thereagainst by a clamping mechanism which includes a bolt I,having the shank ||2 thereof projecting through axial openings ||3 and'l|4 in the clamping disk and carriage body respectively. The bolt isprovided with a head H5 that cooperates with a clamping nut H6 to drawthe disk into clamping engagement with the conical recess, the nut beingprovided with' a handle ||1 whereby it may be readily manipulated.Depending from the lower face of the clamping'disk are bracket arms H8and H9, the arm H8 having a lateral flange |20 at its upper end that isrigidly secured to the clamping disk by fastening devices |2I, and thearm ||9 having a similar iiange |22 provided with slots |23 throughwhich fastening devices such as cap-screws |24 are extended to securethe arm IIS so that the arm l|9 is adjustable to and from the arm ||8 toaccommodate a motor |25 of different size.

The motor |25 has trunnions |25 and |21 extending from oppositediametrical sides th'ereof as shown in Fig. 5. The trunnion |26 is oflarger diameter than the trunnion |21, and has a bevelled periphery |28adapted to be drawn tightly in a conical recess |29 in the inner face oithe arm IIS. The other trunnion, however, is freely movable in analigning opening |30 in the arm ||9. The motor is thus mounted forswinging movement on a horizontal axis to vary the angle of the cuttingtool that may be mounted on the -end |3| of the amature shaft |32 as inconventional practice.

In order to retain the motor in adjusted position, the trunnion havingthe bevelled portion carries a threaded stud |33 that projects throughan opening |34 in the arm ||8 and mounts a clamping nut |35 by which thebevelled portion of the trunnion may be drawn tightly into the conicalsocket, thereby retaining the motor in any desired angular position.

By means of the clamping disk |09, the motor is also adapted to beadjusted about a vertical axis. This is effected by loosening th'eclamping nut ||6 and rotating the clamping disk through the handle whichacts as a lever. In order to prevent relative movement between theclamping disk and the bolt the clamping disk carries a set-screw |36,having the end thereof operable in one of a plurality of grooves |31,formed in the shank ||2 of the bolt as shown in Fig. 8. To supplementclamping action of the disk |09 so that the motor is rigidly retained ina selected adjusted position, the disk also carries a spring-pressedbolt |33, similar to the bolt 24 previously described, and which isadapted to engage one of a circular series of sockets |39 formed in thebottom of the conical recess |01.

If desired the various positional adjustments may be indexed withprotractor scales, for example the trunnion plate 2 may have aprotractor scale as indicated at |40 (Fig. 1) and the turntable I6 maybe provided With a sight opening |4| through which the graduations ofthe protractor scale are exposed and aligned with a mark |42. Likewisethe motor trunnion |26 may have a protractor scale |43 which is readablethrough a window opening |44 in the arm ||8. To facilitate movement ofthe carriage along the tracks of the arm 42 as, for example, in cuttinggrooves, mouldings, and the like, the arm ||8 may be provided with ahandle |45 as shown in Figs. 4 and 5.

In using the motor mounting constructed and assembled as described, thetrunnion plate 2 is secured by fastening devices 6 to a work table 5 sothat the upright or standard is anch'ored in a fixed location but isadapted to rotate thereon to readily position the horizontal arm throughan angle of 360 over any selected portion of the table. When thehorizontal arm 42 is moved to its desired position the bolt 24 is movedinto the registering socket 28 which retains vthe position of thestandard. The arm is thenv vertically adjusted on th'e standard byloosening the bolts 55 and 56 and rotating the crank 69 in the properdirection. After the desired adjustments-the bolts are retightened torigidly retain the arm at the desired elevation.. 'I'he angularrelationship of the motor axis is then adjusted by freeing the bolt |38and loosening the nuts ||6 and |35. 'I'he clamping disk |09 is thenrotated and the motor rocked on its trunnions |26 and |2'| to bring theaxis of the armature shaft at the desired angle, after which the nuts|35 and I6 are retightened.

In case wear should occur between the tracks and rollers, this may bereadily removed by manipulating the eccentric set-screws 93 to move therollers closer to the guide tracks.

At times it may be desirable to fix the carriage upon the supportingarm. This may be effected by a "C clamp |46 which is pivoted .on the endof the carriage and clamps to one of the rails, as shown in Fig. 4.

From the foregoing it is "obvious that we have provided a motor mountingwhich is thoroughly universal as to the positions in which a toolcarried by the motor may -be positioned, and which is rigidly retainedin adjusted position so as to assure accuracyl of tool operation, freeof chate ters and other-imperfections ordinarily caused by insecuremotor mountings.

It is also obvious that the motor is rigidly supported for movement onthe arm as when cutting rabbets, moulding, grinding grooves, making sawcuts and the like, depending upon'the type of tool and the nature of thework to be accom' plished.

What we claim and desire to secure by Letters Patent is:

1. In an apparatus of the character described, an arm havinglongitudinally arranged V-shaped seats on opposite sides thereof, guidebars of rectangular cross-section providing diverging side edges seatedin said V-shaped seats and'having upper and lower converging facesproviding oppositely facing substantially V-shaped track portionssubstantially coextensive with said arm, means securing the guide barsin said V-shaped seats, a carriage having side mem-bers overlappinglopposite sides of the arm and extending over the guide bars, aplurality of spaced rollers carried by the side members above said barsand having V-grooved peripheries engaging with the upper V-shaped trackportions of said bars to suspend the carriage for rolling support on thearm, and a plurality of rollers carried by Said side members below theguide bars and having V-grooved peripheries engaging the lower V- shapedtrack portions of said bars.

2. In an apparatus of the character described, an arm havinglongitudinally arranged V-shaped seats on oppositev sides thereof, guidebars of rectangular cross-section providing .diverging side edges seatedin said V-s'haped seats and having upper and lower converging facesproviding oppositely facing substantially V-shaped track portionssubstantially coextensive with said arm, means securing the guide barsin said V-shaped seats, a carriage having side members overlappingopposite sides of the arm and extending over the guide bars, a pluralityof spaced rollers carried by the side members above said bars and havingV-grooved peripheries engaging with the upper V-shaped track portions ofsaid bars to suspend the carriage for rolling support on the arm,

ya plurality of rollers carried by said side members vbelow the guidebars and having V-grooved peripheries engaging the lower V-shaped tra-ckportions of saidV bars, and means selectively spacing the upper andlower rollers for removing any play which may occur between the rollersand said V-shaped track portions.

3. In an apparatus of the character described, an arm having coextensiveribs projecting outwardly from opposite sides thereof and provided withcoxetensive V-shaped seats, guide lbars of rectangular cross-sectionproviding diverging side edges engaged in said V-shaped' grooves andupper and lower converging faces providing -oppositely facing v-shapedtrack portions substantially coextensive with the arm, fastening devicesextending through said n'bs and into the guide bars for drawing theguide bars into contact with said V-shapedgrooves, .a carriage havingside members overlapping the sides of the arm in spaced relationtherewith, a plurality of spaced rollers carried by the side membersabove said bars and having V-grooved peripheries engaging the upperV-shaped track portions of saidV -bars' to suspend the carriage forrolling support4 relative to the arm, and a plurality of rollers carriedby the side members below the guide bars and having V-groovedperipheries engaging the lower V-shaped track portions ofrrsaid bars.

4. In an apparatus of the character described, a substantiallychannel-shaped arm to provide depending ilanges, ribs projectingoutwardly from said flanges and provided with substantial- 1y` V-shapedgrooves extending longitudinally thereof, rectangular-shaped barsvleaving corner edges engaged in said grooves, fasteningdevicesextending through the anges of said arm and into threaded sockets of thebars to draw the cor ner edges of the bars into rigid engagement with 10corner edges of said bars.

.said V-shaped grooves, a.y carriage having upwardly extending sidesoverlapping the flanges of said amis in spaced .relation with the guidebars,

a plurality of rollers journalled on the sides of the carriage above theguide bars and having V- grooved peripheries engaging upper corner edgesof the bars, and a plurality of rollers carried by the sides of thecarriage below the guide bars and having V-grooved peripheries engagingthe lower HARRY I. WILSON HARRY R. WILSON.

